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A sketch of the sample problem considered in this study is shown. It consists of a eight-story building located close to a railway line. For sake of comparison and to show the capability of handling different configurations, we have considered the following cases:
- surface railway line (denoted by “s” in the following),
- underground railway line (denoted by “u”),
- the intermediate situation where the line is partly underground and partly located in a trench delimited by a retaining wall (denoted by ”u-s”).
Our objective is to study the vibrations induced in the soil and in the building by the passage of a two-carriages train, moving with speed c = 70 km/h = 19.4m/s.